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| Patents for D. O. Fonda | |||||
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| Number | Date | Patentee | Title | Type | |
| 383,281 | May 22, 1888 | W.H. Dodge | Means for securing pulleys on shafts | industrial machine pulleys and belt drive mechanisms | |
| 530,715 | Dec. 11, 1894 | L.O. Orton | Lubricator | industrial machine lubrication | |